purplepacketeater ~ # ipcalc 128.223.177.254/23
Usage: ipcalc [OPTION...]
  -b, --broadcast     Display calculated broadcast address
  -h, --hostname      Show hostname determined via DNS
  -m, --netmask       Display default netmask for IP (class A, B, or C)
  -n, --network       Display network address
  -p, --prefix        Display network prefix
  -s, --silent        Don't ever display error messages 

Help options:
  -?, --help          Show this help message
  --usage             Display brief usage message